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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The viscosity of water is __________ than that of mercury.

Higher
None of these
Lower
Same as

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Hydraulics and Fluid Mechanics in ME
The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to

0.01
0.0001
0.001
0.1

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Hydraulics and Fluid Mechanics in ME
According to fan laws, at constant pressure, the speed capacity and power vary

Directly as the air or gas density
As square of density
Inversely as square root of density
Inversely as density

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Hydraulics and Fluid Mechanics in ME
Which of the following is dimensionless?

Specific weight
Specific gravity
Specific speed
Specific volume

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Hydraulics and Fluid Mechanics in ME
A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is

6 kN/m3
4.5 kN/m3
7.5 kN/m3
10 kN/m3

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Hydraulics and Fluid Mechanics in ME
For small discharge at high pressure, following pump is preferred

Mixed flow
Axial flow
Centrifugal
Reciprocating

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